rex_loopiterator

Call "Action:Add loop" to declare loops with loop-index and start, end, step values for each level of loop. Or call "Action:Add list" to declare loops with loop-index and a value list in JSON format. Note that user should declare loops in a tick, otherwise the loops definition will be reset.

Then call "Action:Next" to get the next loop-indexes. After that, call "Expression:loopindex" to get loop-index.

"Condition:Has next" could be used to test if the looping is finished or not.